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  <li>可注入的</li>
  <li>CommonService</li>
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    <div class="tab-pane fade active in" id="c-info">
        <p class="comment">
            <h3>文件</h3>
        </p>
        <p class="comment">
            <code>server/src/common/services/common.service.ts</code>
        </p>




            <section>
    <h3 id="index">索引</h3>
    <table class="table table-sm table-bordered index-table">
        <tbody>
                <tr>
                    <td class="col-md-4">
                        <h6><b>属性列表</b></h6>
                    </td>
                </tr>
                <tr>
                    <td class="col-md-4">
                        <ul class="index-list">
                            <li>
                                <a href="#redisClient">redisClient</a>
                            </li>
                        </ul>
                    </td>
                </tr>

                <tr>
                    <td class="col-md-4">
                        <h6><b>方法</b></h6>
                    </td>
                </tr>
                <tr>
                    <td class="col-md-4">
                        <ul class="index-list">
                            <li>
                                    <span class="modifier">Async</span>
                                <a href="#checkSVGCode">checkSVGCode</a>
                            </li>
                            <li>
                                    <span class="modifier">Async</span>
                                <a href="#getSiteInfo">getSiteInfo</a>
                            </li>
                            <li>
                                    <span class="modifier">Async</span>
                                <a href="#getSVGCode">getSVGCode</a>
                            </li>
                        </ul>
                    </td>
                </tr>





        </tbody>
    </table>
</section>

            <section>
    <h3 id="constructor">构造方法</h3>
        <table class="table table-sm table-bordered">
            <tbody>
                <tr>
                    <td class="col-md-4">
<code>constructor(settingService: <a href="../injectables/SettingService.html">SettingService</a>, redisService: RedisService, categoryRepository: <a href="../classes/Category.html">TreeRepository<Category></a>)</code>
                    </td>
                </tr>
                        <tr>
                            <td class="col-md-4">
                                <div class="io-line">被定义在 <a href="" data-line="13" class="link-to-prism">server/src/common/services/common.service.ts:13</a></div>
                            </td>
                        </tr>

                <tr>
                    <td class="col-md-4">
                            <div>
                                    <b>参数列表 :</b>
                                    <table class="params">
                                        <thead>
                                            <tr>
                                                <td>名称</td>
                                                    <td>类型</td>
                                                <td>可选的</td>
                                            </tr>
                                        </thead>
                                        <tbody>
                                                <tr>
                                                        <td>settingService</td>
                                                  
                                                        <td>
                                                                        <code><a href="../injectables/SettingService.html" target="_self" >SettingService</a></code>
                                                        </td>
                                                  
                                                    <td>
                                                            否
                                                    </td>
                                                    
                                                </tr>
                                                <tr>
                                                        <td>redisService</td>
                                                  
                                                        <td>
                                                                    <code>RedisService</code>
                                                        </td>
                                                  
                                                    <td>
                                                            否
                                                    </td>
                                                    
                                                </tr>
                                                <tr>
                                                        <td>categoryRepository</td>
                                                  
                                                        <td>
                                                                        <code><a href="../classes/Category.html" target="_self" >TreeRepository&lt;Category&gt;</a></code>
                                                        </td>
                                                  
                                                    <td>
                                                            否
                                                    </td>
                                                    
                                                </tr>
                                        </tbody>
                                    </table>
                            </div>
                    </td>
                </tr>
            </tbody>
        </table>
</section>

            <section>
    
    <h3 id="methods">
        方法
    </h3>
    <table class="table table-sm table-bordered">
        <tbody>
            <tr>
                <td class="col-md-4">
                    <a name="checkSVGCode"></a>
                    <span class="name">
                        <b>
                            <span class="modifier">Async</span>
                            checkSVGCode
                        </b>
                        <a href="#checkSVGCode"><span class="icon ion-ios-link"></span></a>
                    </span>
                </td>
            </tr>
            <tr>
                <td class="col-md-4">
                    <span class="modifier-icon icon ion-ios-reset"></span>
                    <code>checkSVGCode(svg_hash: <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/string" target="_blank">string</a>, svg_text: <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/string" target="_blank">string</a>)</code>
                </td>
            </tr>


            <tr>
                <td class="col-md-4">
                    <div class="io-line">被定义在 <a href="" data-line="53"
                            class="link-to-prism">server/src/common/services/common.service.ts:53</a></div>
                </td>
            </tr>


            <tr>
                <td class="col-md-4">

                    <div class="io-description">
                        <b>参数列表 :</b>
                        <table class="params">
                            <thead>
                                <tr>
                                    <td>名称</td>
                                    <td>类型</td>
                                    <td>可选的</td>
                                </tr>
                            </thead>
                            <tbody>
                                <tr>
                                    <td>svg_hash</td>
                                    <td>
                                                <code><a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/string" target="_blank" >string</a></code>
                                    </td>

                                    <td>
                                        否
                                    </td>


                                </tr>
                                <tr>
                                    <td>svg_text</td>
                                    <td>
                                                <code><a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/string" target="_blank" >string</a></code>
                                    </td>

                                    <td>
                                        否
                                    </td>


                                </tr>
                            </tbody>
                        </table>
                    </div>
                    <div>
                    </div>
                    <div class="io-description">
                        <b>返回 : </b>    <code>{}</code>

                    </div>
                    <div class="io-description">
                        
                    </div>
                </td>
            </tr>
        </tbody>
    </table>
    <table class="table table-sm table-bordered">
        <tbody>
            <tr>
                <td class="col-md-4">
                    <a name="getSiteInfo"></a>
                    <span class="name">
                        <b>
                            <span class="modifier">Async</span>
                            getSiteInfo
                        </b>
                        <a href="#getSiteInfo"><span class="icon ion-ios-link"></span></a>
                    </span>
                </td>
            </tr>
            <tr>
                <td class="col-md-4">
                    <span class="modifier-icon icon ion-ios-reset"></span>
                    <code>getSiteInfo()</code>
                </td>
            </tr>


            <tr>
                <td class="col-md-4">
                    <div class="io-line">被定义在 <a href="" data-line="22"
                            class="link-to-prism">server/src/common/services/common.service.ts:22</a></div>
                </td>
            </tr>


            <tr>
                <td class="col-md-4">

                    <div class="io-description">
                        <b>返回 : </b>    <code>{}</code>

                    </div>
                </td>
            </tr>
        </tbody>
    </table>
    <table class="table table-sm table-bordered">
        <tbody>
            <tr>
                <td class="col-md-4">
                    <a name="getSVGCode"></a>
                    <span class="name">
                        <b>
                            <span class="modifier">Async</span>
                            getSVGCode
                        </b>
                        <a href="#getSVGCode"><span class="icon ion-ios-link"></span></a>
                    </span>
                </td>
            </tr>
            <tr>
                <td class="col-md-4">
                    <span class="modifier-icon icon ion-ios-reset"></span>
                    <code>getSVGCode()</code>
                </td>
            </tr>


            <tr>
                <td class="col-md-4">
                    <div class="io-line">被定义在 <a href="" data-line="31"
                            class="link-to-prism">server/src/common/services/common.service.ts:31</a></div>
                </td>
            </tr>


            <tr>
                <td class="col-md-4">

                    <div class="io-description">
                        <b>返回 : </b>    <code>{}</code>

                    </div>
                </td>
            </tr>
        </tbody>
    </table>
</section>
            <section>
    
        <h3 id="inputs">
            属性列表
        </h3>
        <table class="table table-sm table-bordered">
            <tbody>
                <tr>
                    <td class="col-md-4">
                        <a name="redisClient"></a>
                        <span class="name">
                            <b>
                            redisClient</b>
                            <a href="#redisClient"><span class="icon ion-ios-link"></span></a>
                        </span>
                    </td>
                </tr>
                    <tr>
                        <td class="col-md-4">
                            <i>类型 : </i>    <code>Redis</code>

                        </td>
                    </tr>
                        <tr>
                            <td class="col-md-4">
                                    <div class="io-line">被定义在 <a href="" data-line="13" class="link-to-prism">server/src/common/services/common.service.ts:13</a></div>
                            </td>
                        </tr>


            </tbody>
        </table>
</section>

    </div>


    <div class="tab-pane fade  tab-source-code" id="c-source">
        <pre class="line-numbers compodoc-sourcecode"><code class="language-typescript">import * as crypto from &#x27;crypto&#x27;;
import * as svgCaptcha from &#x27;svg-captcha&#x27;;
import { Redis } from &#x27;ioredis&#x27;;
import { RedisService } from &#x27;nestjs-redis&#x27;;
import { Injectable } from &#x27;@nestjs/common&#x27;;
import { InjectRepository } from &#x27;@nestjs/typeorm&#x27;;
import { Category } from &#x27;../entities/category.entity&#x27;;
import { TreeRepository } from &#x27;typeorm&#x27;;
import { SettingService } from &#x27;./setting.service&#x27;;

@Injectable()
export class CommonService {
	redisClient: Redis;
	constructor(
		private readonly settingService: SettingService,
		private readonly redisService: RedisService,
		@InjectRepository(Category) private readonly categoryRepository: TreeRepository&lt;Category&gt;
	) {
		this.redisClient &#x3D; this.redisService.getClient();
	}

	async getSiteInfo() {
		const menus &#x3D; await this.categoryRepository.findTrees();
		const setting &#x3D; await this.settingService.getSettingByToken();
		return {
			menus,
			...setting.ex_info
		};
	}

	async getSVGCode() {
		const { text, data } &#x3D; svgCaptcha.create({
			size: 4, // 验证码长度
			ignoreChars: &#x27;0oO1I1k&#x27;, // 验证码字符中排除 0o1i
			noise: 4, // 干扰线条的数量
			color: true, // 验证码的字符是否有颜色，默认没有，如果设定了背景，则默认有
			background: &#x27;#cc9966&#x27; // 验证码图片背景颜色
		});
		const svg_hash &#x3D; crypto.createHash(&#x27;md5&#x27;).update(data).digest(&#x27;hex&#x27;);
		
		this.redisClient.set(
			svg_hash,
			text,
			&#x27;EX&#x27;,
			60*2
		);
		return {
			svg_hash,
			svg_code: data
		};
	}

	async checkSVGCode(svg_hash: string, svg_text: string) {
		const svg_text_in_redis &#x3D; await this.redisClient.get(svg_hash);

		if (svg_text_in_redis &amp;&amp; svg_text_in_redis.toUpperCase() &#x3D;&#x3D;&#x3D; svg_text.toUpperCase()) {
			return true;
		} else {
			return false;
		}
	}
}
</code></pre>
    </div>

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